Bobbin clamping device



BOBBIN CLAMP ING DEVICE Filed May 24, 1934 J I AK 43 514 92 \96 :1

Patented June 8, 1937 if l UNITED S ATES PATENT OFFICE Watson-Williams Manufacturing Company, I

Millbury, Mass a corporation of Massachu- Application May'24, 1934, Serial No. 727,301 I 1 Claim. (o1. 139-208) This invention relates to loom shuttles in which a pivoted bobbin-supporting spindle is provided.

It is the general object ofmyinvention to provide improved means for clamping the butt of a bobbin as it is moved with the spindle to operative position in the shuttle, thus effectually preventing axial displacement of the bobbin duringthe operation of the loom.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a partial plan view of a shuttle embodying my improvements;

Fig. 2 is an enlarged sectional side elevation, taken along the line 2--2 in Fig. 1; 4

Fig. 3 is a sectional side elevation similar to Fig. 2 but showing the parts in a different position;

Fig. 4 is a side elevation of the shank portion of the shuttle spindle;

Fig. 5 is a plan view thereof;

Fig. 6 is a side elevation of a bobbin clamp;

Fig. 7 is a plan View thereof; I

Fig. 8 is an end view, looking in the direction of the arrow 8 in Fig. '7;

Fig. 9 is a partial plan view, looking in the direction of the arrow 9 in Fig. 3;

Fig. 10 is a sectional end elevation, taken along the line |0||| in Fig. 9;

Fig. 11 is a sectional end elevation, taken along the line in Fig. 1;

Fig. 12 is a bottom view, looking in the direction of the arrow [2 in Fig. 11;

Fig. 13 is a side elevation of a slightly modified construction, and

Fig. 14 is a plan view thereof.

Referring tov the drawing, I have shown a shuttle S having a bobbin B mounted on a spindle 20. This spindle is preferably split, as indicated in Figs. 2 and 3, and the split portions are spread apart so that their outer surfaces substantially coincide with the tapered inner surface of the bobbin B when mounted thereon.

The spindle 20 is provided with a head or shank 2| (Figs. 4 and 5) having angularly disposed end surfaces 22 and 23 and preferably also having a notch 24 in its lower surface. The spindle 20 also has an enlarged portion 25 to receive the butt of the bobbin and a flange 26 to axially position the bobbin. The bobbin B may be formed of fiber or other suitable thin material and is preferably provided with a metal sleeve or casing 21 having an outwardly projecting end flange 28.

A spring clamping member 3|], preferably made of sheet steel, is mounted .on thespindle shank 2| and may be held from displacement by a pin or rivet 32. The clamping member 30 is of a general U-shape and is provided witha portion 33 connecting the opposite side portions, each of which side portions is outwardly offset, as indicated at 34 (Fig. 7), and is provided with inwardly projecting edge portions or jaws 35 having concave inner faces 36 substantially concentric with the axis of the spindle 20 when the member 30 is in operative position.

The spindle shank 2| is pivoted in a U-shaped holder 40 by a stud 4| passing through aligned openingsin the sides of the holder 4!] and also in the shank 2| and the clamping member 30.

A spring 42 is supported on studs 43 and 44 in the holder 40 and is provided with an end portion adapted to underlie the shank 2| and hold the spindle 20 in operative position as shown in Fig. 2, or adapted to engage the end faces 22 and 23 of the spindle 20 as shown in Fig. 3, thereby holding the spindle in raised position for removal or replacement of the bobbin.

It will be noted that the spindle is thus held in raised position without engaging the relatively thin wood portion 45 (Fig. 3) of the shuttle S which overlies the spindle shank.

A stud 46 (Fig. 12) extends through openings in the opposite sides of the holder 40. When the spindle 20 is in operative position, the stud 46 enters the notch 24 of the shank 2| and provides a stop for limiting downward swinging movement of the spindle.

It will be understood that the shuttle S is suitably recessed to receive the holder 4|! and associated parts, and it will be further understood that the pins 4|, 43 and 44 and the stud 46 are inserted after the holder and other parts are assembled in the shuttle, the pins and stud being inserted through transverse openings 5|] (Fig. 1) in the shuttle body.

The end portions 52 (Fig. 12) of the holder 40 are outwardly offset and embrace the end portions 34 of the clamping member 30 when the parts are in the operative position indicated in Figs. 1 and 2. I

The end portions 52 are so spaced that the jaws 35 of the member 30 will be moved inward with a cam action as the spindle and bobbin are swung downward to operative position, such inward movement causing the jaws 35 to overlap the flange 28 on the butt of the bobbin as indicated in Figs. 11 and 12, thus firmly securing the bobbin against the flange 26 on the spindle. Endwise movement of the bobbin and corresponding wear of the bobbin flange 28 is thus effectually prevented.

Asthe spindle is swung upward, however, to 5 the position shown in Figs. 3, 9, and 10, the

jaws 35 of the clamping member 30 spread apart,

positively clamping the bobbin B on the spindle 20, while at the same time permitting free removal thereof when the spindle is in raised or inoperative position. i 15 In Figs. 13 and 14 I haveshown a slightly modified construction in which the side portions of the clamping member 60 are joined by a connecting portion 6| which extends across the end .of the shank 2| rather than over the top as in 20 the form previously described. The operation and advantages of the modified:construction are the sameas in the previous form.

Having thus described my invention and the advantages thereof, I-do not wish to be limited 25 to the details herein disclosed, otherwise than ing from said rigidly secured end portion in a direction longitudinally of said spindle and at each 'side thereof, and having outwardly inclined intermediate portions engaging said holder and being forced thereby radially inward toward said spindle with a cam action to bobbinclarnping position when said spindle and jaws are moved downward between said ofiset end portions of said holder, and the forward portions'of said holder and said clamping jaws lying in adjacent pairs closely alongside each other when said jaws are-in clamping position.

PHILIP L. SPENCER. 

